soil analysis/ proctor 1

[deebiye]

how can you find the proctor to a particular soil sample in an area. I will be very gratefull if you could recommend a nice book for finding the proctor of a given soil sample .

Thank you. Emmara

 

[GeoPaveTraffic]

The only way to get a Proctor value for a specific soil sample (or type of soil in an area) is to get a sample of the soil and run the test. If you work in an area, you will have a general idea of what the Proctor curve will look like, however, you still would run a test for the specific soil sample.

 

[DarthSoilsGuy]

if testing or running soil load calcs for a large retaining wall, you'll need the sample(s) like roadman's telling you.

if you just want to know for your own good, the Civil Engineering Reference Manual has a table that i think keeps it simple for the Std Proctor. You can see why <95 pcf is sometimes spec'd as unsuitable soils.

If you want to know about crushed gravel, quarries usually keep proctors on their stone that are usually right-on with what we would pound out in the lab. Beware that some people at quarries will tell you the "Proctor" number, but they may have no idea if it is Modified or Standard or what the difference is. Quarries sometimes keep records for Proctors of their overburden sand-rock too.

I prefer my ASTM calibrated squeeze for Proctor testing and thumbpush for the density testing.
-Darth Soilsguy

 

[civilperson]

What is a calibrated squeeze?

 

[dgillette]

For compaction control, I think the bootheel penetrometer is superior to the thumbpush. The thumbpush tends to refuse for moderately dense material, especially if the material is dry of optimum.

 

[dgillette]

The sheepsfoot penetrometer is better still. If the moisture is about right and the lifts aren't too thick, one can generally conclude good compaction has occurred once the roller is running on its feet on the top surface of the lift.

 

[cvg]

loaded water truck is my old standby...